New multi-way SIW power dividers with high isolation

In this letter, a new method is proposed to design SIW-based multi-way power dividers utilizing SIW directional couplers. Two examples respectively with equal and unequal power division ratio are given. The simulated and measured results show that the designed power dividers have wide bandwidth and low insertion loss over the whole operating bandwidth. The phase differences between output ports are also compensated. Moreover, the isolations between the output ports have been significantly improved.